Cesium carbonate → 3-(5-acetyl-4,5,6,7-tetrahydropyrazolo[1,5-a]pyrazin-2-ylamino)-5-bromo-1-methylpyridin-2(1H)-one

HRID 592622노트

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HRID 592622 반응식
[NH2:1][C:2]1[CH:13]=[C:5]2[CH2:6][N:7]([C:10](=[O:12])[CH3:11])[CH2:8][CH2:9][N:4]2[N:3]=1.Br[C:15]1[C:16](=[O:23])[N:17]([CH3:22])[CH:18]=[C:19]([Br:21])[CH:20]=1.C(=O)([O-])[O-].[Cs+].[Cs+].CC1(C)C2C(=C(P(C3C=CC=CC=3)C3C=CC=CC=3)C=CC=2)OC2C(P(C3C=CC=CC=3)C3C=CC=CC=3)=CC=CC1=2>O1CCOCC1.[Pd].[Pd].C(=CC(C=CC1C=CC=CC=1)=O)C1C=CC=CC=1.C(=CC(C=CC1C=CC=CC=1)=O)C1C=CC=CC=1.C(=CC(C=CC1C=CC=CC=1)=O)C1C=CC=CC=1.CO.CCOCC.CCOC(C)=O.O>[C:10]([N:7]1[CH2:8][CH2:9][N:4]2[N:3]=[C:2]([NH:1][C:15]3[C:16](=[O:23])[N:17]([CH3:22])[CH:18]=[C:19]([Br:21])[CH:20]=3)[CH:13]=[C:5]2[CH2:6]1)(=[O:12])[CH3:11]

참가 물질

11

반응물 4

HCID 10796Cesium carbonateHCID 6360441,1'-(9,9-Dimethyl-9H-xanthene-4,5-diyl)bis(1,1-diphenylphosphine)HCID 36143503,5-Dibromo-1-methylpyridin-2(1H)-oneHCID 580440081-(2-amino-6,7-dihydropyrazolo[1,5-a]pyrazin-5(4H)-yl)ethanone

생성물 1

HCID 580440563-(5-acetyl-4,5,6,7-tetrahydropyrazolo[1,5-a]pyrazin-2-ylamino)-5-bromo-1-methylpyridin-2(1H)-one수율 41%

시약·촉매·용매 6

HCID 9832798Tris(dibenzylideneacetone) dipalladium촉매HCID 887Methanol용매HCID 962Water용매HCID 3283Diethyl Ether용매HCID 8857Ethyl Acetate용매HCID 312751,4-Dioxane용매

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온도
100 °C

실험 절차

A sealed tube was equipped with a magnetic stirrer and charged with 125f (860 mg, 4.8 mmol), 3,5-dibromo-1-methylpyridin-2(1H)-one (1.8 g, 6.7 mmol), and cesium carbonate (3.4 g, 10.5 mmol) in 1,4-dioxane (67 mL). After bubbling nitrogen through the solution for 30 min, Xantphos (330 mg, 0.6 mmol) and tris(dibenzylideneacetone) dipalladium(0) (300 mg, 0.3 mmol) were added, and the reaction mixture was heated to 100° C. for 16 h. After this time, H2O (50 mL) and EtOAc (50 mL) were added. The aqueous layer was separated and extracted with EtOAc (2×50 mL). The combined organic extracts were washed with brine (100 mL) and dried over sodium sulfate. The resulting residue was purified by column chromatography eluting with a gradient of CH2Cl2— 60:35:5 CH2Cl2:Et2O:MeOH to afford a 41% yield of 125g (720 mg).

후처리

  1. customA sealed tube was equipped with a magnetic stirrer
  2. customAfter bubbling nitrogen through the solution for 30 min
  3. customThe aqueous layer was separated
  4. extractionextracted with EtOAc (2×50 mL)
  5. washThe combined organic extracts were washed with brine (100 mL)
  6. dry with materialdried over sodium sulfate
  7. customThe resulting residue was purified by column chromatography
  8. washeluting with a gradient of CH2Cl2— 60:35:5 CH2Cl2

출처 및 근거

ORD 기록
ord-c40ac28baec747cc9e63087bcc0c2526
출처 데이터셋
uspto-grants-2016_01
특허 번호
US09238655B2

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